简化排序代码

src/main/java/cn/chjyj/szwh/service/impl/GoodsServiceImpl.java

@@ -465,24 +465,31 @@ public class GoodsServiceImpl implements GoodsService {
         int ret = 0;
         for(int i=0;i<tmpRanklist.size()-1;i++){
             if(goodsIsli.equals(tmpRanklist.get(i).getGoodsIslicode()) ){
+                // 当前项目sort
+                int curSort = tmpRanklist.get(i).getRecommendSort();
                 // 上移
                 if(type==1) {
                     if(i==0){
                         break;
                     }else {
-                        goodsMapper.updateRecommend(tmpRanklist.get(i-1).getGoodsIslicode(),
-                                tmpRanklist.get(i).getRecommendSort());
-                        ret = goodsMapper.updateRecommend(tmpRanklist.get(i).getGoodsIslicode(),
-                                tmpRanklist.get(i-1).getRecommendSort());
+                        //前序sort
+                        int frontSort = tmpRanklist.get(i-1).getRecommendSort();
+                        int afterSort= (frontSort==curSort)?curSort+1:frontSort;
+                        // 前序变更recommend sort
+                        goodsMapper.updateRecommend(tmpRanklist.get(i-1).getGoodsIslicode(),curSort);
+
+                        ret = goodsMapper.updateRecommend(tmpRanklist.get(i).getGoodsIslicode(),afterSort);
                     }
                 }else{
                     if(i==tmpRanklist.size()-1){
                         break;
                     }else{
-                        goodsMapper.updateRecommend(tmpRanklist.get(i+1).getGoodsIslicode(),
-                                tmpRanklist.get(i).getRecommendSort());
-                        ret = goodsMapper.updateRecommend(tmpRanklist.get(i).getGoodsIslicode(),
-                                tmpRanklist.get(i+1).getRecommendSort());
+                        //前序sort
+                        int frontSort = tmpRanklist.get(i+1).getRecommendSort();
+                        int afterSort= (frontSort==curSort)?curSort-1:frontSort;
+
+                        goodsMapper.updateRecommend(tmpRanklist.get(i+1).getGoodsIslicode(),curSort);
+                        ret = goodsMapper.updateRecommend(tmpRanklist.get(i).getGoodsIslicode(), afterSort);
                     }
                 }
             }